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(No Model.) 2 Sheeta-Sheet 1.

O. KLATTE.

ROLLING MILL.

No. 565,996. Patented Au 18, 1896.

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I 0. KLATTE.

2 Sheets-Sheet 2.-

(No Model.)

ROLLING MILL. No. 565,996.

Patented Aug. 18; 1896.

UNITED STATES PATENT OFFICE.

OTTO KLATTE, OF NEUl/VIED, GERMANY.

ROLLING-MILL.

srncrrrcnrron forming part of Letters Patent No. 565,996, dated August 18, 1896.

Application filed February 26, 1896. Serial No. 580,855. (No model.) Patented in Germany October 26, 1894, No. 81,290'

in Luxemburg November 4, 1894, No. 2,159; in France November 7, 1894, No. 242,661 in Belgium November 11, 1894, No. 112,659 inEnglandNovember 11, 1894,1To. 21,716 in Hungary .Tune 8, 1895, No. 4,168, and in Austria July 1,1895,

To all whom it may concern:

Be it known that I, Orro KLATTE, a sub ject of the King of Prussia, Emperor of Germany, residing at Neuwied-on-the-Rhine, Germany, have invented certain new and useful Improvements in Rolling-Mills for Producing Continuous and Endless Articles, (for which I have obtained Letters Patent in Germany, No. 81,290, dated October 26, 1894; in Luxemburg, No. 2,159, dated November 4, 1894; in France, No. 242,661, dated November 7, 1894; in Belgium, No. 112,659, dated November 11, 1894; in Great Britain, No.

21,716, dated November 11, 1894; in Austria, N0. 45/4,314, dated Julyl, 1895, and in Hungary,No. 4,168, dated June 8, 1895,) of which the following is a specification.

This invention relates to rolling-mills for continuously and in endless form. The metal under treatment takes the form of an endless body-i. e., of a ring or annular body. The rolling process from the original to the final section takes place inone and the same grooving in two or three high rolling-mills, but in the latter casein two passages through the rolls, which are, however, formed by one groove of the central roll, the endless form of the metal under treatment being retained throughout the whole process and the rolls being caused to rotate uninterrupted and in one and the same direction until the required final section has been obtained and the annular body correspondingly enlarged,

whereupon the long endless band produced is to be divided.

It may be remarked here that it is customary in making band as also flat iron to give the same one or two polishing or finishing passages through special rolls, and in making wire to give the same a round oval and finishing passage through special rolls. Thus in this kind of rolling products the a term frequiredfinal section, above mentioned, must be construed to refer to the section obtained previous to these finishing passages.

This invention consists in a rolling-mill the coacting rolls of which are provided with corresponding guide and working surfaces inclined to the shafts, one of the rolls being fixed, the other or others being laterally movable on their shafts, so that by pressing the rolls against one another a pressure is exercised 011 the metal under treatment in an inclined direction to the shafts of the rolls.

In the accompanying drawings I have shown as an example of carrying out my invention a three-high rolling-mill, of WhlOh-' Figure 1 is a front elevation, partly in section, and Fig. 2 a vertical section; but the upper or the under roll may be dispensed with, so that the mill forms only a two-high rolling-mill.

a is the central, 1) the top, and cthe bottom, roll. The central roll may be arranged in stationary bearings, in which case the other two must have adjustable bearings, but, if desired, the bottom roll may be provided with stationary bearings and the two upper ones with movable bearings. In the latter case the pressure. necessary for performing the rolling operation would be applied to the top roll, which in its turn would communicate it to the central roll, whence it would be imparted to the bottom roll. Since according to this arrangement an approximately equal pressure is exercised on the central roll from above and below, the same is in a certain sense relieved or compensated, so that it will be sufiicient to support the same in bearings at one side only even for doing heavier kinds of work.

:In order to be able to insert the annular body to be rolled between the rolls, the top roll must be raised and the bottom one lowered, or if the shaft of the latter rests in stationary bearings the top and the central rolls are tobe raised, but the top roll more than the central roll. The said annular body, which I shall term hereinafter the ring, may either be cast or may also be formed by bending a metal bar and welding its ends together. The said metal bar may have been previously rolled, pressed, or forged in any desired manner The ring is now placed in the groove of the central roll advantageously while still hot from the mold,

or if local circumstances will not admit of this the ring should be further heated in a furnace. -Immediately after the ring has been placed in the groove the rolls are approached and set in motion.

The top and bottom rolls are laterally movable on their shafts, the central roll being fast on its shaft, preferably by means of a clamp ing-ring d, by means of which it is pressed or retained firmly against a collar or shoulder 6, formed on the said shaft. All the rolls have conical surfaces, as shown, and two adjacent rolls have certain of their conical surfaces in contact with each other, such surfaces being inclined with reference to the axes of said rolls preferably under angles of forty-five degrees. As the rolls are made to approach one another the movable roll is shifted laterally and the vertical pressure exerted upon one roll is decomposed into a component vertical to the guiding conical surface and into another component parallel thereto. This latter component acts upon the metal under treatment between the rolls, so that it is subjected not to a pressure acting vertically to the axes, as usual, but to a pressure inclined under forty-five degrees to the axes, as indicated by the arrows in Fig. 1. Owing to the shape of the rolls and the arrangement of three rolls, all as illustrated in Figs. 1 and 2, the effectis attained that the endless metal under treatment running round between these rolls is subjected simultaneously to two pressing actions, which in relation to the metal itself are at right angles to each other. It is to be noted expressly that these pressures in relation to the treatment of the metal do not fall in the same direction as would seem at first glance, but that their directions form an angle of ninety degrees with each other. Therefore the result is the same as in the case Where a bar is passed between two cylindrical rolls, then turned about ninety degrees, and again passed through the said rolls, or where a bar is passed through a universal rollingtrain having two horizontal and two vertical rolls. The movable rolls are arrested in their extreme positions (see dotted lines in Fig. 1) by means of set-screws f, screwed into a collar g, being fast on the shaft, and are returned to their original positions when the rolls are moved apart by means of springs 7t, their movement in this direction being also limited by set-screws 2' being screwed into the rolls, passed freely through holes of the collar and surrounded by the springs h. This arrangement is specially adapted for producing square bar-iron, quadrilateral and rectangular wire, which are the primary shapes for wire having circular section.

The working surfaces, which are shown in Fig. l as plain conical surfaces, can also be made concave, in which case the section of the metal under treatment will assume an ogival form or that of an arched quadrangle.

For all rolls an interior Water cooling is provided, as may be seenat i in Fig. 1.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In rolling-mills the combination of two coacting rolls being provided with corresponding guide and working surfaces inclined to the shafts, one of the rolls being fixed, the other laterally movable on its shaft, the rolls being pressed against each other and accordingly exercising a pressure on the metal under treatment in an inclined direction to the shafts of the rolls, substantially as described.

2: For rolling bar, band and wire like articles continuously and in endless form the combination. of a roll being fixed on its shaft and two coacting rolls being laterally movable on their shafts, the rolls having correspondin g guide and workin g surfaces inclined to the shafts, the rolls being pressed against one another and accordingly exercising on the endless metal under treatment a pressure simultaneously in two directions vertical to each other, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

OTTO KLATTE.

Witnesses:

MARIA NAGEL, WILLIAM H. MADDEN. 

